Improvement in plaiting devices for sewing-machines



W. WALKER. A PLAI'TINGDBVICE POR SEWNGMACHINBS. V I No. 110,699. @nl Patented Jan. 3, 18741.v

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UNITED, STATES PATENT OFFICE.

. WILLIAM WALKER, OF BROOKLYN, NEW YORK, ASSIGNOR TO GEORGE H.

WOOSTER, Oll NEW YORK CITY.

Letters Patent No. 110,699, dated January 3, 1871.

IMPROVEMENT IN PLAITING DEVICES FOR SEWING-MACHINES.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom tt may concern:

Be it known t-hat I, WlLLLvM WALKER, of Brooklyn, in the county of Kings and State of N ew York, have invented a new and useful Improvement in Ilaiting Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing forming part of this specification, and in which` Figure l represents a plan of a sewing-machine in part, with a plaiting device constructed in accordance with my invention applied thereto; and v Figure 2,11. vertical section taken as indicated by the line a' a, in hg. 1.

Similar letters of reference indicate corresponding parts.

My invention relates to a plaiting device mainly designed to be applied to a sewing-machine, and consists, firstly, in a plaiting-knife arranged to operate through an opening in the bed-plate or work-plate of the machine, against the sole or face of the ordinary presser-foot, and between the said sole or foot and an edge of said opening, for the purpose of producing a. plaiting operation.

rIhe invention also includes a combination of two knives, arranged so that the one works above thematerial in connection with the bed-plate of the machine, andthe other one works below the material in connection with the presser-foot, and whereby I am enablcdto produce auton'iatically a reversed plaitcd trimming.

Iteferring to the accompanying` drawing- A represents the bed-plate, and

B B' the presser-footof a sewing-machine.

This presser-foot, or the one portion B of it and the port-ien of the bed-plate lying under it, are so shaped that a plaiting-knife, C, is free, in' its folding action on the material D, for the production of the plait, to work or have 'a sliding action against the under surface of the presser-foot and against an edge provided on the plate.

Io this end an opening, a., is provided in the plate, and the presser-ibut is made to project over the edge e of said opening, which presents itself toward and parallel, or nearly so, with the edge 0f the plaitingknife C, and in such position that the said knife., in

advancing, while sliding along the sole of the presser-A feeding device of the machine operates, raising the foot and moving in concert with the knife. 'Ihe knife rccedcs after the feeding movement 0f the cloth ceases, and in the meantime the feeding device allows the foot to come down and hold the plait which has been formed.

In the drawing two knives, G O', are shown operating in concert with each other on the material I), but on opposite sides of the latter, said knives being arranged side by side at suitable distances apart, and so that, while the one knife, C, works below the material against or under the presser-foot o1` port-ion B thereof, as hercinbefore described, the other knife C' works above the material over or against and in connection with the bed-plate A, a presser-foot or portion, B', thereof holding down the material or side of it over which the knife C' works during the forward movement of the latter.- v

In this way I ain enabled to produce a reversed plaited trimming, the plaits being formed fronlthe under side of lthe material along itsv one edge, and from the upper side of said material along its opposite edge. v

Different combinations of devices may be used to give to the knives O O' their specied respective aetions. 'lhus they maybe secured, iu a separately adjustable manner, by crooked arms lil E', to a rocking and sliding shaft, F, arranged parallel with the feed, and actuated, to communicate te the knives their forward stroke, by a cam, G, on a revolving shaft, H, operating against a toc, S, on the shaft F, a spring, I, on

the one end of the shaft F, serving to subsequently work the knives back.

On the shaft I'I are also two cams, J J', which act on legs b 7) of rocking-frames K K', having their bearings, as at c c', on the shaft F, and provided with crooked arms L L', that, when the cams J J bear on the legs b b of the frames K K' to rock the latter, act upon the arms E E to close the knives O Cy against the material, but when the cams J J cease to operate the rocking frames K K', then saidframes are released from bearing on the arms E E by means of a spring, llI, arranged to connect said rocking frames. In this way the knives G C are made to advance nnder hold or pressure on the material, and to retire free from such pressure.

A double row of stitching, d d, as produced by two needles, may be made to secure the trimming through or in line of its reversed plaits.

I do not claim, broadly, a plaiting-knife working within or through a recess in the bed-plate and in Contact with the bottom of the presser.

What is here claimed, and desired to be secured by Letters Patent, is-

l. The plaiting-knife O and presser-foot B, lin such combination with each other, and with the edge v of an opening in the bed-plate, as'V herein specified,

in connection with the bed-plate A, while the other is arranged to opel-:ite below the material in connection with the presser-foot of t-he machine, essentially that the said knife plait-s over the said edge, and be- :Ls specified. tween it; and the sole ofthe presser-foot, as herein de- WM. WALKER. scribed. Witnesses:

FRED. HAYNES, R. E. RABEAU.

2. The combination of the two knives, C C', the one of which is arranged to work above the material 

